Stapling machine



Aug. 7, ?1928. '1,679,662

'B. JAHN STAPLING MACHINE Filed Sept. .22, 1926 A TT ORNE V PatentedAug. 7; 1 928.'

"U ITED STAT'ESA PATENT OFFICE.

BnB'rHoLD JAEN, or NEW BRITAIN, coNNEc'rIcU'r, ASSIIGNOR ro GERTRUDE H.HEYN,

OF WESTPORT,

CON N ECTICUT. r

STAPLING MACHINE. l

Application filed September 2 ,My invention relates to staplingmachines, and more particularly to that class of ma-` chine in which astrip of connected staples is fed automatically to a point of cutting,at

I which point the staples are individually severed from the strip anddriven by means of a plunger. In machines of 'this class it is thepractice to provide a vertical channel for guiding the individual stapleas it is severed from the strip down to the point where the stapleenters the wood, paper or other material into or through which 'it isdriven. The channel is defined by walls which control the movement ofthe severed staple and one wall of this channel also serves to limit theforward movement of the staple strip as it is fed forward at eachoperation to bring the end of the' strip into position-for the cuttingoperation. In some cases, through defective o eration of the machine, orbecause of some efect in the staple., the' severed staple becomesclogged in the guiding channel and this interferes with the operation ofthe machine. The object of my present invention is to provide simple andinexpensive means for removing a member which forms part ofthe guidingchannel, in order to permit accessto the staple which may have becomeclogged in the machine. ao Preferably, this removable member forms theforward member of the channel guide and it is so constructed that whenin operative position it will effectively guide the severed staple aswell as the lower end `of 85 the driving plunger. This member is adaptedto be quickly released to provide access to the' clogged st'aple, and inthe preferred form of m invention the guiding member may be re easedwithout the use of tools. 4

In the drawing forming part of this application, Figure 1 is a sideelevation of a. stapling machine of the character referred to having myinvention applied thereto,

Figure 2 is a secti'onal view of a portion thereof taken on the line 2-2.of Figure 3,

Figure 3 is a sectional view taken on the line 3--3 of Figure 1, and

Figure 4 is a perspective view of the movall channel member detachedfrom the mac e.

2, 1926. serial No. 136,928.

drawing I have shown only such partsof the complete machine as may benecessary to an understanding of the present invention. I .have shown abase 1 having an anvil 2 formed at one end, against which the staplesare adapted to be driven and clenched; and at the opposite end .of thebase there are upstandlng'ears 3 to which the Cutter bar of the machineis pivoted by means of the pin 4. The cutter bar 5 along which the stripof staples is guided is of the usual construction and 1 s mounted uponthe pivots pin 4. The' housing or casing 6' encloses most of themechanism of the machine and it forms a guide for the plunger 7 whichisVertically movable` in the forward end of the casin There is a knob 8 onthe upper end ofthis plunger which is adapted to be struck, by the handin order to drive the plunger downwardly to sever and clench thestaples'; and the return operation of the plunger is effected by thecoiled spring 9 acting between the top of the frame and the knob. Thestrip of staples 10 ofwell known form and 'of U shape in cross section,is fed along the top of the cutter bar -5 so that the back of the striprests'on top of the Cutter bar, and the prongs of the staples projectdownwardly on each side thereof, as shown in Figure 2. The staple stripis fed forwardly the width of one staple at each operation of theplunger by means of the feed pawl 11 which is pivoted at 12 upon the camplate 13 which itself pivots upon the pin 14. This plate has a camportion 15 which is acted upon by the .plunger to oscillate the plate 13for the purpose of operating the feed pawl, The

forward end of the detent 16 is also' indicated in the drawing, thismember serving to prevent the retraction of the staple strip while thefeed pawl is moving back to engage behind a pair of prongs ready for thefeeding. operation. All of the above arts are of well known constructionan are usually incorporated in the various stapling machines now on themarket.

When the staple strip is moved forwardly into position for the severingoperation the forward end of the strip overhangs the cutter bar to anextent corresponding with the width of a single staple and the verticalguiding channel is in alignment with this portion of the staple whichoverhangs the cutter bar. Tn the construction shown in the drawing thischannel is partly defined by the members 17, 18 of the frame or housingwhich constitute the side walls of the channel. The rear wall of thischannel is composed of the cutter bar 5 and partly by the V side rails19 which separate the cutter bar 22 extending bet-ween the two sidewalls.

This connecting wall is preferably formed to provide the inwardlyextending portions 23 at each side, arranged at right angles to the sidewalls 20, 21 and from there the 'metal extends outwardly at right anglesto form the walls 24 and a connecting wall 25. This constructionprovides an offsetpocket in which "the vertical rib 26 of the plunger isadapted to travel, and in which it is adapted tobe guided. One of theside walls 20 of the member 19 is provided with a slot 27 to receive theprojecting end of the pin 28 which projects from one side 17 of thecasing. The other side wall 21 of this member is also provided with aslot 29 to receive a shank of the headed pin 30 which projects from theopposite side wall 18 of the casing. There is a lever pivoted at 31 tothe side wall 21 and it is provided with a finger piece 32 at one end,and adjacent its pivotal point it is provided with a hook 33 to engageover the shank: of the pin 30.

To apply the movable guide member to p the casing the lever 34 israised, as shown in Figure 4, and the member 19 is slipped over theforward ends of the casing members 17, 18 so that the pins 28, 30 arereceived within the Slots 27, 29. The lever 34 is then swung down untilthe hook 33 engages over the pin 30 whereupon the movable guidememin theguide-way. v

ber will be attached in place ready for 'operation; and it'will remainin this position until such time as it may be necessary to remove astaple which has become clogged When the staple strip is moved forwardly'in the feeding operation, the forward end of the strip will stopagainst the portions 23 of the member 19 and this will define thefeeding position of the strip. When the plunger isstruck by thehand itmoves down forced into or through the paper or other material into Whichthe' staple is to be driven. While the severed staple is movingdownwardly, it is guided on the forward side by means of the member 19and more particularly by'the portions 23 and on other sides the stapleis guided by the frame mem: bers 17, 18 and the cutter bar, so that itis maintained in a Vertical position while it is !being driven. `Whenthe plunger moves downwardly the projecting rib 26 thereof is guided inthe pocket 35 formed by the ofiset portionof the member 19, the same asif this member constituted a 'rigid portion of the frame proper. Thepins 28, 30, together with the hook 33 retain the member 19 rigidly inplace against the end of the frame, so that this member serves the samefunction as if it were formed as an integral part of the frame. lif thestaple 'should become clogged in the raceway, or jammed, then the member19 may 'be detaohed in order to open the lower end of the raceway andeither permit the clogged staple to fall out or to permit the operatorto dislodge it. To remove the member 19 the lever 34 is raised torelease the hook 33 from the pin 30 whereupon the member'19 may be movedto the left in Figure 2 until the portions 20, 21 disengage from thepins 28, 30. It will be apparent that this movable member forming partof the raceway, permits ready access at all times to a clogged staple.

Having described my invention, what T claim is:

1. In a stapling machine'in which a preformed strip of staples is fedforwardly, the combination'with a frame, a cutter bar for guiding thestrip of staples to the cutting position, said frame and cutter barbeingfixed in relation to each other, a plunger for severing and drivingthe end staple of the strip and movable at right angles to the cutterbar, a raceway for guiding the severed staple formed partly by saidframe, and a front member, and means for holding said front member onsaid frame, including pins on the frame adapted to be received ir. Slotsin said front member, and a lever .pivoted to said front member andadapted to be hooked over one of said pins for locking said front memberupon said casing.

2. In a stapling machine inwhioh a pre- *formed strip of staples is fedforwardly, the

combination with a frame, a cutter bar for guiding the strip of staplesto the cutting position, said frame and cutter bar being fixed inrelation to each other, a plunger for severing and driving the end stale of the strip and movable at right ang es to the Cutter bar, and araceway for the severed staple formed partly by said frame, a frontmember also forming part of said raeeway, having side walls forstraddling the frame, said side walls having Slots, ins on said frameadapted to be received m said Slots,

and a lever pivoted to said front member and adapted to hook over one ofsaid pins 10 for locking the front member to the frame.

Signed at New Britain, county of Hartford, State of Connecticut, this18th day of September, 1925.

BERTHOLD J AHN.

